Paving composition.



, UNITED sr-Arns PATENT OFF-ICE.

JOSEP HAY AMIEs, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE AMIES ASPHALT comP NY, or PHILADELPHIA, PENNSYLVANIA, A CORPORATION or SOUTH DAKOTA.

N 0 Drawing.

To all 'wlfom it may concern. it

Be it known that I, Jos PH HAY Alums,

a citizen of the United States, residing at Philadelphia, inthe county of Philadelphia and State of Pennsylvania, have invented a certain new and useful Paving Composition, of which the following is a specification.

This invention has reference to the employment of gas or coal tar or like materials in manufacturing a composition for paving making and like uses.

Artificial gas is generally used for lighting and fuel purposes and in its manufacture in the small villages and towns, not

more in most cases than ten to twenty barrels of gas or coal tar will result per month, in the said manufacturing of gas. This tar is now placed in costly barrels and shipped to central locations, Where it is utilized for many manufacturing purposes, the'residuum resulting from such uses is in the form of a hard coal or gas tar pitch. This hard, pitch is the material usually employed in paving making and like uses. Many elements, useful forpaving making, having been exthe cost of paving compositions to a minimum.

From the Well at the gas making plants I pump liquid tar into portable tanks mounted upon suitable vehicles and take it at once to the location Where. Imake the paving composition. Preferably I em loy the said tar at once. The reason for t is will occur as my process is explained. It is desirable that the well at the gas makinig plant should be tight, allowing of as litt e evaporation of the volatile elements as possible. The said tar contains a considerable amount of water when first produced, and in this thin condition will readily mix, while cold, with cold mineral matters. Indeed I prefer not to Specification of Letters atent. Application and February 20, 19cc. semi 1510. 479,259.

. PAVING comr osi'izmn.

Patented Dec. 7, 1909.

apply heat to the said tar, as I wish toretain elements that would be drivenofi' by heat. Imay use crushed stone,'slag, pebbles,

soil or fibers or any such like materials, mixing the tar therewith while all are in a cold state. The tendency of tar is to Work upfrom the bottom of the constructed road and Work to the surface where air and water soon cause. disintegration. I obviate this defect by my process.

My, process is as follows :-I place the mineral or other materials I am about to' employ upon a mixing board or in a mixing machine, and mix them well with the said tar. I then coat them with powdered calcium oxid. I may usecalcium hydrate, for this purpose, but the former is preferable. The composition thus formed can now be placed in a storage house or elevated bin, or

'it may remain in the open, if it is not needed for immediate use. In this condition it can his convenience for road, street, sidewalk, or path construction, or like uses. The composition thus made will be of a very superior quality. The objections to the use of coal tar or gas tar for the above purposes will be obviated by my process, because the calcium oxid takes up the Water and light volatile oils of the said tar and converts and fixes them ;thus,- greatly needed elements of the tar are preserved, instead of being lost, as is usually the case. In the ordinary employment of tar for paving making the water remains intimate in combination with some of the lighter oils of the tar and causes early disintegration thereof. Another ob-j jectlonin employing undistilled tar for paving purposes, is the fact that it is too sensibe sold to the general contractor, for use at tive to the suns heat, and will usually bleed andrun on the surface of the street. The only Way now adopted to prevent this disagrecable result is by placing a heavy coating of grit or screenings, 'san or fine crushe stone over the tar, thus bu ing it quite deeply. This practice results in a very lean road orstreet surfacing that will soon wear away. This difficulty I obviate by my fl process. I also make a composition indl erent to changes of temperature and eliminate.

aging. Bleeding 01' greasing of the surface of my pavement is unknown. I am h'owever not confined to gas or coal tar. I may in the above mannerv employ the residuum of petroleum and crude oil refineries, and the I manufacture for paving making, owing to the efl ect of the calcium oxid, as I employ it. I may also use any of the above mentioned materials on a road and sprinkle thereon the calcium oxid or calcium hydrate, then adding sand, screenings, or the like and rolling, thus making the mixture in situ.

What I claim is,i--

The herein described composition which consists in mixing coal tar, and the like, with suitable elements such as crushed stone and the like, and adding and mixing therewith calcium oxid or calicum hydrate for the purposes set forth.

In testimony whereof I hereunto sign my name,

JOSEPH HAY AMIES. \Vitnesses \VILLIAM J. J A CKSON, S. F. K0011. 

